What properties does Node.js express's Error object expose?

Question

I would like to know what are the functions that the Error object of nodejs express exposes for use in error handling? A `console.log` of an error call `new Error('NotFound')` is showing only `[Error: NotFound]`. Is this because the `.toString()` method is overriden? How do I find the properties and functions exposed by these objects?

Accepted Answer

The `Error` object is actually a native object provided by `V8`, rather than by `node.js` or `express`.

The property that will most likely be of the most use to you is `stack`. E.g.,

```
console.log(new Error('NotFound').stack);
```

There are other properties available as well, such as `name` and `message`. You can read up on them here. Just be aware that those docs are for Mozilla's JavaScript engine, so don't count on anything flagged as `Non-standard` to work in `node.js`.

What properties does Node.js express's Error object expose?

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